<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js";></script>
<script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js";></script>
<script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js";></script>

</head>
<body>
    <div id="app">

    </div>
    <script type="text/babel">
    class App extends React.Component{
        constructor(props){
            super(props);
            this.state = {
                msg:"state"
            }
        }
        render(){
            return (
                /* bind可以解决this关键字指向的问题 */
                <h1 onClick={this.handleClick.bind(this)}>{this.state.msg}</h1>    //this.state.msg去获取state的数据

            )
        }
        handleClick(){
            console.log(this)
            console.log("event");
        }
    }
        ReactDOM.render(
            <App/>,
            document.getElementById("app")
        );

        /* 
        vue中数据放在data中
        react数据方法constructor里面的state中 */
    </script>
</body>
</html>